Phytopigments are a marker of the amount of organic matter that settles in sedim
ID: 3201062 • Letter: P
Question
Phytopigments are a marker of the amount of organic matter that settles in sediments. Phytopigment concentrations in deep-sea sediments collected worldwide showed a very strong right-skew. Of these two summary statistics, 0.01 and 0.013 grams of phytopigment per square meter of bottom surface, which one is the mean and which one is the median and why?
A) We cannot tell which is the mean and which is the median without looking at the data.
B) Since the distribution is strongly right-skewed, we expect the mean to be larger than the median. Therefore 0.013 is the mean and 0.01 the median.
C) Since the distribution is strongly right-skewed, we expect the mean to be smaller than the median. Therefore 0.013 is the median and 0.01 the mean.
Explanation / Answer
For strongly right skewed , mean is always larger than median.
So, the correct option is Option-B) Since the distribution is strongly right-skewed, we expect the mean to be larger than the median. Therefore 0.013 is the mean and 0.01 the median.